The flight-tracking website FlightAware.com shows 348 cancellations Thursday in and out of Charlotte Douglas International Airport, as of 2:30 p.m. That’s up from 49 cancellations on Wednesday.

PSA airlines, a regional carrier for American Airlines, accounted for 209 of the cancellations. Most cancellations Wednesday were flights between Charlotte and Florida, whose panhandle was mauled by Michael, but on Thursday they involved airports nationwide.

The center of Tropical Storm Michael was expected to barely miss Charlotte on Thursday as it moves from South Carolina toward Raleigh, bringing heavy rain that could cause flash flooding and possibly damaging winds.

The National Weather Service says Charlotte will get about 3.7 inches of rain Thursday, with higher amounts to the west and north. Winds of 30 mph or higher will reach the metro area by mid-afternoon. A flash flood watch is in effect for the Charlotte region throughout the day.

Hurricane Michael made landfall in the Florida Panhandle as a powerful Category 4 storm with sustained winds around 155 mph. Tropical storm force winds are likely in Alabama, Georgia, the Carolinas and Virginia.

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